Swift

Objective-C

Swift

// Use Firebase library to configure APIs
FirebaseApp.configure()

Objective-C

// Use Firebase library to configure APIs
[FIRApp configure];

When a new user signs up using your app's sign-up form, complete any new
account validation steps that your app requires, such as verifying that the
new account's password was correctly typed and meets your complexity
requirements.

Create a new account by passing the new user's email address and password
to createUserWithEmail:email:password:completion:.

Objective-C

If the new account was successfully created, the user is signed in, and you
can get the user's account data from the result object that's passed to the
callback method.

To protect your project from abuse, Firebase limits the number of new
email/password and anonymous sign-ups that your application can have from the
same IP address in a short period of time. You can request and schedule
temporary changes to this quota from the
Firebase console.

Sign in a user with an email address and password

The steps for signing in a user with a password are similar to the steps for
creating a new account. In your app's sign-in activity, do the following:

Objective-C

If the user successfully signs in, you can get the user's account data from
the result object that's passed to the callback method.

Next steps

After a user signs in for the first time, a new user account is created and
linked to the credentials—that is, the user name and password, phone
number, or auth provider information—the user signed in with. This new
account is stored as part of your Firebase project, and can be used to identify
a user across every app in your project, regardless of how the user signs in.

In your apps, you can get the user's basic profile information from the
FIRUser object. See Manage Users.

In your Firebase Realtime Database and Cloud Storage
Security Rules, you can
get the signed-in user's unique user ID from the auth variable,
and use it to control what data a user can access.